Is there a genetic link component to asthma?
For many years it has been known that there are familial, if not genetic, factors involved in the development of asthma. This has been demonstrated by studies that show the following: the aggregation of asthma in families, first-degree relatives have a higher prevalence of asthma than unrelated individuals, and monozygotic (identical) twins are more likely to have asthma than dizygotic (fraternal) twins.
